Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)

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	Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)
	Guo, ZJ; Zhang, ZD; Zhao, XG; Song, XP; Wang, BW; Jin, XM; Geng, DY
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2002-05-01
卷号	18 期号:3 页码:219-224
关键词	Sm0.9Pr0.1(Fe1-xCox)(2) magnetic ordering exchange interaction
ISSN号	1005-0302
通讯作者	Zhang, ZD(zdzhang@imr.ac.cn)
英文摘要	Structure, magnetic properties and magnetostriction of Sm0.9Pr0.1(Fe1-xCox)(2) compounds have been investigated by means of X-ray diffraction, a.c. initial susceptibility, extracting sample magnetometer, Mossbauer Spectroscopy and standard strain gauge techniques. The lattice parameter a of the MgCu2-type Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2) decreases nonlinearly with increasing Co concentration, deviating from the Vegard's law. Curie temperature T, increases initially from 668 K for x=0 to 694 K for x=0.2 and then decreases to 200 K for x=1.0. The saturation magnetization M. at temperatures 1.5 K, 77 K and 300 K have the same variation tendency as the composition dependence of Curie temperature, in consistence with rigid-band model. The easy magnetization direction (EMD) of Sm0.9Pr0.1(Fe1-xCox)(2) lies along [111] direction in the range xless than or equal to0.6, and changes to [110] for x=0.8, while Sm0.9Pr0.1Co2 stays in the paramagnetic state at room temperature. The composition dependence of the average hyperfine field, H-hf, demonstrates a similar variation tendency as that of the saturation magnetization M-s and Curie temperature T-c. The spontaneous magnetostricton lambda(111) increases with increasing Co content. The saturation magnetostriction lambda(s) decreases monotonically with increasing x, which is caused by the increase of magnetostriction constant lambda(100) with opposite sign to that of lambda(111). A two-sublattice model has been proposed to understand the intermediate region between the [111] and [110] spin configurations, which can also be used to explain the temperature dependence of magnetization.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000176003400006
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/115286]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, ZD
作者单位	Chinese Acad Sci, Inst Met Res, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Guo, ZJ,Zhang, ZD,Zhao, XG,et al. Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2002,18(3):219-224.
APA	Guo, ZJ.,Zhang, ZD.,Zhao, XG.,Song, XP.,Wang, BW.,...&Geng, DY.(2002).Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2).JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,18(3),219-224.
MLA	Guo, ZJ,et al."Magnetic ordering and exchange interaction of Laves compounds Sm0.9Pr0.1(Fe1-xCox)(2)".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 18.3(2002):219-224.